1663297970 has 8 divisors (see below), whose sum is σ = 2993936364. Its totient is φ = 665319184.

The previous prime is 1663297913. The next prime is 1663298009. The reversal of 1663297970 is 797923661.

It can be written as a sum of positive squares in 2 ways, for example, as 1598640289 + 64657681 = 39983^2 + 8041^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×1663297970² = 5533120274012241800, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 83164889 + ... + 83164908.

Almost surely, 2^1663297970 is an apocalyptic number.

1663297970 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1663297970 is a deficient number, since it is larger than the sum of its proper divisors (1330638394).

1663297970 is a wasteful number, since it uses less digits than its factorization.

1663297970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166329804.

The product of its (nonzero) digits is 857304, while the sum is 50.

The square root of 1663297970 is about 40783.5502378103. The cubic root of 1663297970 is about 1184.8317563964.

The spelling of 1663297970 in words is "one billion, six hundred sixty-three million, two hundred ninety-seven thousand, nine hundred seventy".